CN107576888A - Positioning method of positioning system of electric energy quality disturbance source - Google Patents
Positioning method of positioning system of electric energy quality disturbance source Download PDFInfo
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- CN107576888A CN107576888A CN201710901417.9A CN201710901417A CN107576888A CN 107576888 A CN107576888 A CN 107576888A CN 201710901417 A CN201710901417 A CN 201710901417A CN 107576888 A CN107576888 A CN 107576888A
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- A kind of 1. localization method of the alignment system of power quality disturbance, it is characterised in that:The power quality disturbance What each monitoring point of transmission line of electricity of the alignment system including Power quality management main website and in radial pattern distribution system was set One electric energy quality on-line monitoring device, connected by Ethernet between each electric energy quality on-line monitoring device, each electric energy matter Connected between amount on-Line Monitor Device and Power quality management main website by Ethernet;When actual disturbance event occurs in system When, electric energy quality on-line monitoring device detect can record after disturbance event at the time of disturbing source occurs and by Ethernet with The mode of broadcast notifies that other electric energy quality on-line monitoring devices start disturbance recording system on the basis of the moment in network, Record the top n cycle at the moment and the sampled data of N number of cycle, N >=1, and be sent to quality of power supply pipe in real time afterwards Manage main website;Power quality management main website stores device number and the place monitoring point of each electric energy quality on-line monitoring device Address;Localization method using the alignment system of above-mentioned power quality disturbance includes the following steps:1. the distribution system topological structure known to, is built with radical structure chart, and identify each electricity in whole system The positional information of energy quality on-line monitoring device layout points;2. establishing whole system set covering theory, according to having in system, each node of radical is related to electric energy quality on-line monitoring device Position relationship, the set covering theory A of definable systemL×M, AL×MIt can be completed in system initialization:Wherein, L is to have the node total number in radical in system, the line segment quantity in M correspondence systems, is what is installed in whole system Electric energy quality on-line monitoring device quantity, matrix AL×MEach data ai×jJ-th of the quality of power supply is supervised online in expression system Device layout points and the position relationship of i-th of electric energy quality on-line monitoring device monitoring point are surveyed, initialization is specifically entered as:If If LiPositioned at MjForward region, then make aij=-1, it is on the contrary;aij=+1, the M described in systemjBackward region refers to j-th of electricity The child node region of energy quality on-line monitoring device arrangement node and the node;Forward region refers in addition to backward region Other node regions;3. detect that the power network quality of power supply is asked according to the electric energy quality on-line monitoring device in system at a certain moment point During the disturbance source event such as topic or generation electric current, voltage jump, the equipment can be recorded at the time of disturbing source occurs and pass through ether Net notifies other electric energy quality on-line monitoring device OnNow fault recording systems in network in a broadcast manner, records The top n cycle at the moment and the afterwards sampled data of N number of cycle, N >=1, each electric energy quality on-line monitoring device in system Fiducial time of the agreement as whole system when IEEE1588 pairs is used between Power quality management main website;4. after each electric energy quality on-line monitoring device equipment completes recording work, electric energy quality on-line monitoring device can basis The noisy data detected confirms event type;5. moment that each electric energy quality on-line monitoring device in network is sent to Power quality management main website in real time System set covering theory and the product of system orientation matrix, the recorded broadcast at multiple moment playback mutually compare, each institute's recording shape The essence that source event occurs is disturbed in the system location information acquisition system stored in spectrum analysis and Power quality management main website True time and position, it is comprised the following steps that:First, uploaded in real time according to each electric energy quality on-line monitoring device when system set covering theory and generation disturbance source event The information of main website, establish the direction matrix B at the system momentM×1:In formula, bjWhen disturbance source event occurs in expression system at i-th of line segment, j-th of electric energy quality on-line monitoring device equipment To the result of determination in disturbing source direction, if it is decided that disturbing source is backward disturbance, that is, determines disturbance source event positioned at j-th of electricity After energy quality on-line monitoring device equipment, then b is madej=+1;Conversely, bj=-1;bjValue carry markers, Power quality management When main website can then establish generation disturbance source event by the real time data information that each electric energy quality on-line monitoring device uploads The system orientation matrix at quarter;<mrow> <mtable> <mtr> <mtd> <mrow> <msub> <mi>B</mi> <mrow> <mi>L</mi> <mi>a</mi> <mn>2</mn> </mrow> </msub> <mo>=</mo> <mfenced open = "[" close = "]"> <mtable> <mtr> <mtd> <mrow> <mo>+</mo> <mn>1</mn> </mrow> </mtd> </mtr> <mtr> <mtd> <mrow> <mo>-</mo> <mn>1</mn> </mrow> </mtd> </mtr> <mtr> <mtd> <mrow> <mo>-</mo> <mn>1</mn> </mrow> </mtd> </mtr> <mtr> <mtd> <mrow> <mo>-</mo> <mn>1</mn> </mrow> </mtd> </mtr> </mtable> </mfenced> </mrow> </mtd> <mtd> <mrow> <msub> <mi>B</mi> <mrow> <mi>L</mi> <mi>a</mi> <mn>3</mn> </mrow> </msub> <mo>=</mo> <mfenced open = "[" close = "]"> <mtable> <mtr> <mtd> <mrow> <mo>+</mo> <mn>1</mn> </mrow> </mtd> </mtr> <mtr> <mtd> <mrow> <mo>+</mo> <mn>1</mn> </mrow> </mtd> </mtr> <mtr> <mtd> <mrow> <mo>-</mo> <mn>1</mn> </mrow> </mtd> </mtr> <mtr> <mtd> <mrow> <mo>-</mo> <mn>1</mn> </mrow> </mtd> </mtr> </mtable> </mfenced> </mrow> </mtd> </mtr> </mtable> <mo>;</mo> </mrow>Then, system set covering theory and the system orientation matrix at the moment are subjected to matrix multiplication operation, obtain matrix of consequence CL×1 For:<mrow> <msub> <mi>C</mi> <mrow> <mi>L</mi> <mo>&times;</mo> <mn>1</mn> </mrow> </msub> <mo>=</mo> <msub> <mi>A</mi> <mrow> <mi>L</mi> <mo>&times;</mo> <mi>M</mi> </mrow> </msub> <mo>&times;</mo> <msub> <mi>B</mi> <mrow> <mi>M</mi> <mo>&times;</mo> <mn>1</mn> </mrow> </msub> <mo>=</mo> <mtable> <mtr> <mtd> <msub> <mi>L</mi> <mn>1</mn> </msub> </mtd> </mtr> <mtr> <mtd> <msub> <mi>L</mi> <mn>2</mn> </msub> </mtd> </mtr> <mtr> <mtd> <mo>.</mo> </mtd> </mtr> <mtr> <mtd> <mo>.</mo> </mtd> </mtr> <mtr> <mtd> <mo>.</mo> </mtd> </mtr> <mtr> <mtd> <msub> <mi>L</mi> <mi>i</mi> </msub> </mtd> </mtr> </mtable> <mfenced open = "[" close = "]"> <mtable> <mtr> <mtd> <msub> <mi>c</mi> <mn>1</mn> </msub> </mtd> </mtr> <mtr> <mtd> <msub> <mi>c</mi> <mn>2</mn> </msub> </mtd> </mtr> <mtr> <mtd> <mo>.</mo> </mtd> </mtr> <mtr> <mtd> <mo>.</mo> </mtd> </mtr> <mtr> <mtd> <mo>.</mo> </mtd> </mtr> <mtr> <mtd> <msub> <mi>c</mi> <mi>i</mi> </msub> </mtd> </mtr> </mtable> </mfenced> <mo>,</mo> </mrow>Each element c in matrix of consequenceiValue and electric power networks topological structure and electric energy quality on-line monitoring device specific cloth It is relevant to put situation, according to ciThe absolute value of value whether be equal to the quantity of electric energy quality on-line monitoring device arranged in system Element number, moment row element c is confirmed if equaliCorresponding line segment LiFor power quality disturbance;Finally, after having preliminary disturbance source locating information, c is passed throughiValue come determine the specific quality of power supply monitor on-line fill When putting layout points and specific line segment, then this of Power quality management main website be sent to by each electric energy quality on-line monitoring device The wave record playback function at quarter, which is compared, eliminates the fuzzy item of disturbing source and accurate time, by being stored in Power quality management master Stand or electric energy quality on-line monitoring device equipment on positional information can then obtain disturbance source event occur specified place.
- A kind of 2. localization method of the alignment system of power quality disturbance according to claim 1, it is characterised in that:Step Suddenly 1. in, each electric energy quality on-line monitoring device in system is identified according to the device address of electric energy quality on-line monitoring device Deployment scenarios, the table is stored in the database of Power quality management main website, as needed each quality of power supply on-line monitoring Also the positional information of residing layout points can be stored in device.
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Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN110146778A (en) * | 2019-04-18 | 2019-08-20 | 国网上海市电力公司 | AC system transient voltage fluctuation time of origin determines method and device |
Families Citing this family (17)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
WO2016138750A1 (en) * | 2015-03-04 | 2016-09-09 | 江苏省电力公司常州供电公司 | Power quality disturbance source locating system and locating method |
CN104635114B (en) * | 2015-03-04 | 2017-11-21 | 江苏省电力公司常州供电公司 | Electric energy quality disturbance source positioning system and positioning method |
CN106855597B (en) * | 2016-12-28 | 2019-03-29 | 天津求实智源科技有限公司 | A kind of non-intrusion type power quality interference source online adaptive monitoring system and method |
CN106940407A (en) * | 2017-03-15 | 2017-07-11 | 湘潭大学 | A kind of positioning of distribution network system electrical energy power quality disturbance and recognition methods |
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CN108053095B (en) * | 2017-11-22 | 2024-03-19 | 全球能源互联网研究院有限公司 | Power quality disturbance event feature extraction method and system |
CN107884654A (en) * | 2017-12-06 | 2018-04-06 | 国网江苏省电力公司检修分公司 | A kind of transformer station's multiple spot equipment for monitoring power quality and method |
CN110097238A (en) * | 2018-01-29 | 2019-08-06 | 全球能源互联网研究院有限公司 | A kind of electrical energy power quality disturbance event methods of exhibiting and system |
CN108206541A (en) * | 2018-01-30 | 2018-06-26 | 国网上海市电力公司 | A kind of distribution network electric energy quality disturbance source locating method containing distributed generation resource |
CN108663602B (en) * | 2018-05-14 | 2019-07-23 | 山东大学 | Flexible direct current power distribution network monopole failure line selection and Section Location and system |
CN108646209A (en) * | 2018-06-08 | 2018-10-12 | 广西电网有限责任公司电力科学研究院 | A kind of equipment for monitoring power quality on-site proving system and calibration method |
CN108802490B (en) * | 2018-06-25 | 2020-08-28 | 中国石油大学(华东) | Quasi-synchronous starting and synchronous data acquisition method for harmonic on-line monitoring terminal under time-alignment-free condition |
CN109490711B (en) * | 2018-11-27 | 2020-12-01 | 中国南方电网有限责任公司 | Disturbance path analysis method based on protection starting recording data |
CN110579734B (en) * | 2019-07-29 | 2021-09-21 | 广西电网有限责任公司 | Method for analyzing electric energy quality of single-phase electric energy meter and single-phase electric energy meter |
CN114675079A (en) * | 2022-04-11 | 2022-06-28 | 东南大学溧阳研究院 | Method and system for extracting high signal-to-noise ratio voltage sag disturbance signal for reconstructing steady state waveform |
Citations (8)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN102081134A (en) * | 2010-12-14 | 2011-06-01 | 山东电力集团公司东营供电公司 | Method for locating disturbance source of electrical power system |
US20110153236A1 (en) * | 2008-04-14 | 2011-06-23 | Michel Montreuil | Electrical anomaly detection method and system |
CN103076533A (en) * | 2012-12-28 | 2013-05-01 | 华北电力大学(保定) | Analysis method for line parameter and fault disturbance in power grid |
CN203054126U (en) * | 2013-01-11 | 2013-07-10 | 山东电力集团公司电力科学研究院 | An electric power system disturbance source positioning system based on higher harmonic equivalent impedance characteristics |
CN103576053A (en) * | 2013-10-09 | 2014-02-12 | 国家电网公司 | Voltage sag source locating method based on limited electric energy quality monitoring points |
CN103605016A (en) * | 2013-10-30 | 2014-02-26 | 广东电网公司电力科学研究院 | Electric energy quality data processing method and apparatus thereof |
CN103605027A (en) * | 2013-11-26 | 2014-02-26 | 国家电网公司 | Network voltage sag source positioning system |
CN104155580A (en) * | 2014-08-19 | 2014-11-19 | 国家电网公司 | Voltage sag source positioning method with association analysis and electric power calculation being combined |
Family Cites Families (9)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US6633861B2 (en) * | 1993-03-19 | 2003-10-14 | Ricoh Company Limited | Automatic invocation of computational resources without user intervention across a network |
DE10136344A1 (en) * | 2001-07-26 | 2003-02-06 | Seba Mess Ortungstech | Fault location in branched low and middle voltage power distribution networks by use of impulse current generators with resultant fault location independent of reflections in the cable network |
CN101267116B (en) * | 2008-03-20 | 2011-08-31 | 浙江工业大学 | An automatic positioning method for power quality interference source of distribution grid |
CN101515015B (en) * | 2009-03-06 | 2010-12-08 | 深圳市双合电气股份有限公司 | Power quality monitoring and recording device of power system |
CN101860076B (en) * | 2010-04-21 | 2012-05-09 | 东北大学 | Electric energy quality monitoring and analyzing system |
CN202177672U (en) * | 2011-08-17 | 2012-03-28 | 武汉大学 | High voltage 10KV electric energy quality comprehensive test platform |
KR101354895B1 (en) * | 2012-06-01 | 2014-01-23 | 엘에스산전 주식회사 | A power monitoring system and a method for displaying information of a power system |
CN204536472U (en) * | 2015-03-04 | 2015-08-05 | 江苏省电力公司常州供电公司 | A kind of power quality disturbance positioning system |
CN104635114B (en) * | 2015-03-04 | 2017-11-21 | 江苏省电力公司常州供电公司 | Electric energy quality disturbance source positioning system and positioning method |
-
2015
- 2015-03-04 CN CN201510097288.3A patent/CN104635114B/en active Active
- 2015-03-04 CN CN201710901417.9A patent/CN107576888B/en active Active
- 2015-03-04 CN CN201710900139.5A patent/CN107576887B/en active Active
Patent Citations (8)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US20110153236A1 (en) * | 2008-04-14 | 2011-06-23 | Michel Montreuil | Electrical anomaly detection method and system |
CN102081134A (en) * | 2010-12-14 | 2011-06-01 | 山东电力集团公司东营供电公司 | Method for locating disturbance source of electrical power system |
CN103076533A (en) * | 2012-12-28 | 2013-05-01 | 华北电力大学(保定) | Analysis method for line parameter and fault disturbance in power grid |
CN203054126U (en) * | 2013-01-11 | 2013-07-10 | 山东电力集团公司电力科学研究院 | An electric power system disturbance source positioning system based on higher harmonic equivalent impedance characteristics |
CN103576053A (en) * | 2013-10-09 | 2014-02-12 | 国家电网公司 | Voltage sag source locating method based on limited electric energy quality monitoring points |
CN103605016A (en) * | 2013-10-30 | 2014-02-26 | 广东电网公司电力科学研究院 | Electric energy quality data processing method and apparatus thereof |
CN103605027A (en) * | 2013-11-26 | 2014-02-26 | 国家电网公司 | Network voltage sag source positioning system |
CN104155580A (en) * | 2014-08-19 | 2014-11-19 | 国家电网公司 | Voltage sag source positioning method with association analysis and electric power calculation being combined |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN110146778A (en) * | 2019-04-18 | 2019-08-20 | 国网上海市电力公司 | AC system transient voltage fluctuation time of origin determines method and device |
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